Offline positioning and reference correcting device for blade with journal

Abstract

The invention discloses an offline positioning and reference correcting device for a blade with a journal. The offline positioning and reference correcting device is characterized in that the offlinepositioning and reference correcting device is used for positioning and correcting the blade with the journal after batch milling, the blade with the journal comprises a blade journal, and a blade angular face, and the offline positioning and reference correcting device comprises a blade positioning module, a blade measuring module, a quick-change tool, a six-channel measuring instrument, switchesand buttons which are arranged on a bottom plate. According to the offline positioning and reference correcting device for the blades with the journal, four angular points of a blade body of the blade are used for positioning to correct the reference of the blade, allowance distribution of the blade under the new reference can be uniform, and a 3R quick-change clamp is used for simultaneously completing alignment clamping in the process of measuring the blade so that grouping of the blade according to the machining allowance obtained after batch milling can be facilitated, the machining consistency of the blade before numerical control polishing is improved, and subsequent array synchronous polishing is facilitated.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a device capable of performing self-adaptive positioning and datum correction on blades with journals according to machining allowances during the processing of blades of aero-engines. Background technique [0002] In the manufacturing process of aeroengine compressor blades, milling is one of the important processes. In this process, there are various machining errors that will lead to deformation of the blade machining, and the uneven distribution of the margin under the original benchmark. There are mainly machine tool adjustment errors, clamping errors, and process system errors before processing; force deformation errors, thermal deformation errors, and tool wear errors during processing; errors caused by residual stress after processing. Under the overall effect of these errors, different degrees of bending and torsion deformation, chord length error, and thickness erro...

AI Technical Summary

Problems solved by technology

However, it is unavoidable that although the blades have met the design tolerance requirements in the pre-polishing process, due to the existence of processing deformation, there will still be surface differences when batch polishing is performed after batch milling of blades, resulting in final batch processing. The polishing pass rate and efficiency will be affected to a certain extent. The factory's traditional practice is to use the sample method to test the light transmission of the milled blades, and then group them according to the margin marks and lines, and then perform manual polishing in batches.

This method is inefficient, labor-intensive, and depends on the experience of the operator, resulting in unstable quality

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